Why Christmas Day sales could become a reality

Online browsing has become so second nature thanks to smartphones that even Christmas Day is no longer immune from people grabbing a deal, and more retailers are taking advantage.

Christmas Day is still typically the slowest day of the holiday season for retail sales and traffic, but its popularity is growing. Last year, mobile accounted for 34.8% of all online sales on Christmas Day, up more than 20% from 2013, according to IBM Digital Analytics Benchmark. This year, Christm...